In the late 1960s Negron was hired to contribute concept artwork for the classic musical, Hello Dolly . His paintings inspired grand creations on the Fox Studio lot. **verify: One such painting paved the way for a rather large scene in which a grand parade was filmed.
During the 1970s Negron produced art for King Kong (1978) and Star Trek: The Motion Picture (1976). Both films are renowned for their advancements in special effects.
During the 1980s Negron’s work comprised of a number of films including Raiders of the Lost Ark (1981), Inner Space (1988), and Jo Jo Dancer, Your Life is Calling (1986). The work from Raiders of the Lost Ark was very preliminary, but the style seems to have been influential on the final film.